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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
Seems to be old news, but I can't remember having seen this posted he
http://www.sony.net/SonyInfo/News/Pr...69E/index.html "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
#2
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
Alfred Molon wrote:
Seems to be old news, but I can't remember having seen this posted he http://www.sony.net/SonyInfo/News/Pr...69E/index.html "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 ?, 5MP In any case, this technology has no reached the consumer sector. Not quite yet. The first use of it will reach the consumer sector next month, in Sony's two new HD video cameras the HDR-CX520VE/505VE. The chips have been in mass production and on sale for very roughly a year now and will soon appear in other products by other manufacturers. This is not a flash-in-the-pan, it's the first development for the market of a new sensor technology which is being developed and refined and will appear in other sizes, megapixels, densities, etc.. The increased signal to noise ratio, even if Sony are exaggerating a bit, is sufficiently dramatic to refute the claims of those who have been arguing that current sensor pixel performance had reached some kind of physically limited plateau in which the only possibilities were juggling the existing compromises between size, resolution, and noise. -- Chris Malcolm |
#3
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Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise
Alfred Molon wrote:
Seems to be old news, but I can't remember having seen this posted he http://www.sony.net/SonyInfo/News/Pr...69E/index.html "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. Something seems not quite right. 8db is not a great SNR in my book. |
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
On Sat, 11 Jul 2009 09:04:28 -0500, Don Stauffer wrote: Alfred Molon wrote: Seems to be old news, but I can't remember having seen this posted he http://www.sony.net/SonyInfo/News/Pr...69E/index.html "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. Something seems not quite right. 8db is not a great SNR in my book. Sounds like it's saying that it's 8db *better* than existing Sony CMOS sensors of the same pixel size. 8db *better* SNR is huge in the world of signal processing. Steve |
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Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise
Don Stauffer wrote:
Alfred Molon wrote: Seems to be old news, but I can't remember having seen this posted he http://www.sony.net/SonyInfo/News/Pr...69E/index.html "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. Something seems not quite right. 8db is not a great SNR in my book. You're right, but remember these are small sensors with a small pixel pitch. A full frame sensor will typically have a SNR of over 35dB, and a pixel pitch 4-5 times larger. A typical professional video camera will have an SNR of over 60db. Maybe 8dB is an improvement in the consumer market. |
#6
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
In article , SMS says...
Maybe 8dB is an improvement in the consumer market. An increment of 8dB is an increase by a factor of 2.5. Very significant in any sector - both consumer and professional. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
#7
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Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise
Alfred Molon wrote:
In article , SMS says... Maybe 8dB is an improvement in the consumer market. An increment of 8dB is an increase by a factor of 2.5. Very significant in any sector - both consumer and professional. That article didn't say "an increment". |
#8
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
On Sat, 11 Jul 2009 09:04:28 -0500, Don Stauffer
wrote: Alfred Molon wrote: Seems to be old news, but I can't remember having seen this posted he http://www.sony.net/SonyInfo/News/Pr...69E/index.html "The newly developed CMOS image sensor achieves a signal-to-noise ratio of +8dB(+6dB sensitivity, -2dB noise) in comparison to existing Sony CMOS image sensors of the same pixel size. Sony will apply this back- illuminated CMOS technology in consumer digital video camcorders and digital still cameras to deliver an even higher quality image experience." Pixel pitch 1.75 µ, 5MP In any case, this technology has no reached the consumer sector. Something seems not quite right. 8db is not a great SNR in my book. It doesn't say that. It says "in comparison" |
#9
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Sony develops back-illuminated CMOS sensor, with twofold sensitivity and low noise
In article , SMS says...
Alfred Molon wrote: In article , SMS says... Maybe 8dB is an improvement in the consumer market. An increment of 8dB is an increase by a factor of 2.5. Very significant in any sector - both consumer and professional. That article didn't say "an increment". It says "Signal-to-noise ratio improvement of +8dB", i.e. 8dB more = an increment of 8 dB. -- Alfred Molon ------------------------------ Olympus 50X0, 8080, E3X0, E4X0, E5X0 and E3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
#10
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Sony develops back-illuminated CMOS sensor, with twofold sensitivityand low noise
Alfred Molon wrote:
SMS says... Alfred Molon wrote: SMS says... You're right, but remember these are small sensors with a small pixel pitch. A full frame sensor will typically have a SNR of over 35dB, and a pixel pitch 4-5 times larger. A typical professional video camera will have an SNR of over 60db. Maybe 8dB is an improvement in the consumer market. An increment of 8dB is an increase by a factor of 2.5. So it was 12dB, now 20dB? Very significant in any sector - both consumer and professional. That article didn't say "an increment". It says "Signal-to-noise ratio improvement of +8dB", i.e. 8dB more = an increment of 8 dB. -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |
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